Cold outside or not, if nature calls after dinner you must do what you have to do!  After putting on my comfy boots to keep my paws warm I clip a SpotLit™ L.E.D. Pet Light to my collar for my outing.  This innovative technology provides visibility for safety outdoors after the sun sets.  With winter here that sun sets earlier and earlier.

 SpotLit™ L.E.D. Pet Light

http://www.seniorpetproducts.com/product/spotlit-led-pet-light-p2487.html?&parent=308